Erasing your disk: Migrating mac os to new hard drive. For most reasons to erase, including when reformatting a disk or selling, giving away, or trading in your Mac, you should erase your entire disk.
Erasing a volume on your disk: In other cases, such as when your disk contains multiple volumes (or partitions) and you don't want to erase them all, you can erase specific volumes on the disk.
- 3rd: select your hard drive on the left hand side list. Chose the Erase tab. And for the volume format, chose MAC Os Extended. Let it reformat, when it’s done, open up your hard drive, and copy back in the original files back onto it. You should be able to drag in files and what not! I hope this helped, hopefully your problem is what I think.
- May 04, 2020 HARD DRIVE IS FULL: This is the most common reason why Mac files won’t copy to external hard drive. THE FILE SIZE IS TOO BIG: Even if the hard drive has a large space, it may not be able to accept file from your Mac if the size of the file is larger than the external drive.
May 11, 2017 Can't Copy or move files after upgraded to Windows 10. Reboot and see if you can then copy files from drive to drive. We strongly suggest to have a computer technician install your new hard drive if ever you decided to buy a new one. Also, the technician.
Erasing a disk or volume permanently deletes all of its files. Before continuing, make sure that you have a backup of any files that you want to keep.
How to erase your disk
- Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
If you're not erasing the disk your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder. - Choose View > Show All Devices from the menu bar in Disk Utility. The sidebar now shows your disks (devices) and any containers and volumes within them. The disk your Mac started up from is at the top of the list. In this example, Apple SSD is the startup disk:
- Select the disk that you want to erase. Don't see your disk?
- Click Erase, then complete these items:
- Name: Type the name that you want the disk to have after you erase it.
- Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
- Scheme: Choose GUID Partition Map.
- Click Erase to begin erasing your disk and every container and volume within it. You might be asked to enter your Apple ID. Forgot your Apple ID?
- When done, quit Disk Utility.
- If you want your Mac to be able to start up from the disk you erased, reinstall macOS on the disk.
How to erase a volume on your disk
- Start up from macOS Recovery. Then select Disk Utility from the Utilities window and click Continue.
If you're not erasing the volume your Mac started up from, you don't need to start up from macOS Recovery: just open Disk Utility from the Utilities folder of your Applications folder. - In the sidebar of Disk Utility, select the volume that you want to erase. The volume your Mac started up from is named Macintosh HD, unless you changed its name. Don't see your volume?
- Click Erase, then complete these items:
- Name: Type the name that you want the volume to have after you erase it.
- Format: Choose APFS or Mac OS Extended (Journaled). Disk Utility shows a compatible format by default.
- If you see an Erase Volume Group button, the volume you selected is part of a volume group. In that case, you should erase the volume group. Otherwise, click Erase to erase just the selected volume. You might be asked to enter your Apple ID. Forgot your Apple ID?
- When done, quit Disk Utility.
- If you want your Mac to be able to start up from the volume you erased, reinstall macOS on that volume.
Reasons to erase
You can erase at any time, including in circumstances such as these:
- You want to permanently erase all content from your Mac and restore it to factory settings. This is one of the final steps before selling, giving away, or trading in your Mac.
- You're changing the format of a disk, such as from a PC format (FAT, ExFAT, or NTFS) to a Mac format (APFS or Mac OS Extended).
- You received a message that your disk isn't readable by this computer.
- You're trying to resolve a disk issue that Disk Utility can't repair.
- The macOS installer doesn't see your disk or can't install on it. For example, the installer might say that your disk isn't formatted correctly, isn't using a GUID partition scheme, contains a newer version of the operating system, or can't be used to start up your computer.
- The macOS installer says that you may not install to this volume because it is part of an Apple RAID.
About APFS and Mac OS Extended
Disk Utility in macOS High Sierra or later can erase using either the newer APFS (Apple File System) format or the older Mac OS Extended format, and it automatically chooses a compatible format for you.
How to choose between APFS and Mac OS Extended
Disk Utility tries to detect the type of storage and show the appropriate format in the Format menu. If it can't, it chooses Mac OS Extended, which works with all versions of macOS. If you want to change the format, answer these questions:
- Are you formatting the disk that came built into your Mac?
If the built-in disk came APFS-formatted, Disk Utility suggests APFS. Don't change it to Mac OS Extended. - Are you about to install macOS High Sierra or later for the first time on the disk?
If you need to erase your disk before installing High Sierra or later for the first time on that disk, choose Mac OS Extended (Journaled). During installation, the macOS installer decides whether to automatically convert to APFS—without erasing your files. - Are you preparing a Time Machine backup disk or bootable installer?
Choose Mac OS Extended (Journaled) for any disk that you plan to use as a Time Machine backup disk or as a bootable installer. - Will you be using the disk with another Mac?
If the other Mac isn't using macOS High Sierra or later, choose Mac OS Extended (Journaled). Earlier versions of macOS don't work with APFS-formatted volumes.
How to identify the format currently in use
If you want to know which format is currently in use, use any of these methods:
- Select the volume in the Disk Utility sidebar, then check the information shown on the right. For more detail, choose File > Get Info from the Disk Utility menu bar.
- Open System Information and select Storage in the sidebar. The File System column on the right shows the format of each volume.
- Select the volume in the Finder, then choose File > Get Info from the menu bar. The Get Info window shows the Format of that volume.
If your disk or volume doesn't appear, or the erase fails
- Shut down your Mac, then unplug all nonessential devices from your Mac.
- If you're erasing an external drive, make sure that it's connected directly to your Mac using a cable that you know is good. Then turn the drive off and back on.
- If your disk or volume still doesn't appear in Disk Utility, or Disk Utility reports that the erase process failed, your disk or Mac might need service. If you need help, please contact Apple Support.
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Learn more
- If you can't start up from macOS Recovery, you can use a different startup disk instead.
- If Disk Utility shows a Security Options button in the Erase window, you can click that button to choose between a faster (but less secure) erase and a slower (but more secure) erase. Some older versions of Disk Utility offer the option to zero all data instead. These secure-erase options aren't offered or needed for solid-state drives (SSDs) and flash storage.
Jul 10, 2020 • Filed to: Answer Hard Drive Problems • Proven solutions
Can I copy my operating system and files from one hard drive to another hard drive? I want to wipe the other hard drive clean.
Of course you can. But what you should pay attention to is that you can't simply copy and paste your operating system by using Ctrl + C and Ctrl + V, for this only copies files that you can see, but there are many other invisible files, core components of your system like boot files, that can't be copied in the way. So if you want to copy OS to a new hard drive and want it work normally, you have to clone or image it. Only cloning and imaging can help to copy the full operating system.
How to Copy OS fully to a new hard drive?
To clone or image the full operating system, you need to use a third party program that supports cloning or imaging your Windows. You can try Wondershare LiveBoot Boot CD, with which you can clone your OS or image your OS. And the bootable CD/USB it offers gives you a pure environment without any infection or damage. You can copy a clean operating system for your new hard drive.
Tips:
Cloning OS will help you make a OS copy exactly as your original one, while imaging OS will help to copy your OS as an image file. Both of them are full OS contents.
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Step 1. Boot your computer from LiveBoot
Insert the CD or plug in the USB to your computer and start it. Choose to boot from LiveBoot. This LiveBoot integrates with the latest Microsoft PE 3.0 technology, and it's compatible with all brands of computers. Even when your computer can't be booted up, you also can use this LiveBoot to boot your computer and copy your operating system.
Step 2. Begin to copy your OS
After getting into Windows, the LiveBoot will be launched automatically. Then go to 'Disk Management', and you can copy your OS here now.
You can choose to clone the entire disk or only the partition where your operating system exists. The content you clone will keep the original path. Or you can choose 'Disk Backup' or 'Partition Backup' to image your operating system to another disk.
Step 3. Copy OS to your new hard drive
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After cloning or imaging your OS, you can copy it to your new hard drive now. If you choose to clone, you can clone it to your new drive just as the steps you operated above. If you image it, you can restore it to your new hard drive. And that's done.
Of course, if you don't think your operating works well, you can choose to reinstall it on your new hard drive. And this LiveBoot can help to find your Windows ID and key. You don't need to spend any extra dollars in purchasing a Windows.
What's Wrong with Drive
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- Recover Your Drive
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